psoas major muscle

(redirected from Psoas magnus muscle)

pso·as ma·jor mus·cle

(sō'as mā'jŏr mŭs'ĕl)
Groin muscle; origin, bodies of vertebrae and intervertebral discs from twelfth thoracic to fifth lumbar, and transverse processes of lumbar vertebrae; insertion, forms common insertion with iliacus muscle into lesser trochanter of femur; action, primary flexor of hip joint; nerve supply, lumbar plexus (ventral rami of first, second, and usually third lumbar spinal nerves).
Synonym(s): greater psoas muscle, musculus psoas major.

psoas major muscle

Thigh muscle. Origin: bodies of vertebrae T12-L1. Insertion: lesser trochanter of femur. Nerve: lumbar L1-L3. Action: flexes thigh.
See also: muscle